Concrete beam chair



w. E. WHITE. CONCRETE BEAM CHAIR.

APPLICATION FILED SEPT.4, I920. RENEWED MAR- 2, I922- lAl 5, M; Patenm y 9, 1922.

WILLIAM E. WHITE, OF CHICAGO ILLINOIS.

CONCRETE BEAM CHAIR.

Specification of Letters Patent.

Patented May 9, 1922.

Application filed September 4, 1920, Serial No. 498,294. Renewed March 2, 1922. Serial No. 540,569.

To all whom it may concern:

Be it known that I, VVILLIAU E. \Vnrrn, a citizen of the United States,'and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Concrete Beam Chair, of which the following is a specification.

My invention relates to reinforcing de vices and particularly to a novel spacer adapted for use in the formation of. beams. ribs or joists in floor or ceiling work.

One of the objects of my invention is to provide a device which shall serve to accurately position reinforcing bars in suitable spaced relation to the forms and which shall be stable after having been installed.

A further object is to-provide a device of this sort which may be constructed entirely of wire, this being the most economical form in which metal may be used; the wire also lends itself to ready manipulation, as far as is adaptationto the dies employed is concerned. Some variations are required in these spacers or chairs and, in the form here disclosed, these variations may be made at a minimum expense of dies. Variations, such as referred to, are of two kinds; first, in the rib width; and, second, in bar elevation. All of these variations may be taken care of without a change in the dies employed. The change in rib or beam width is secured by varying the length of the connecting member, and this is readily effected by changing the point of cut oif of the wire. The change in bar elevation is secured by changing the point of cut oif of the V-shaped legs or supports.

By electrically welding the connecting member to the \i-shaped supports I allow for ready interchange of parts to meet different conditions. The legs or supports, as

constructed, provide for a maximum base for stability and areadapted to resist displacement in any direction.

A further important advantage is in that the construction shown offers a minimum of. obstruction to the flow of concrete. This is an important point and the same result is not secured with more complicated devices, or those formed of pressed or sheet.

metal.

- The invention will be more readily un-i derstood by reference to the accompanying drawings, wherein, v

Fig. 1 is a sectionalview showing a device, such as contemplated by me, in a beam;

Fig. 2 is an enlarged elevation of the chair;

Fig. 3 is an end view thereof;

Figs. 4 and 5 are side and end views re spcctively of a slightly modified form; and

Figs. 6 and 7 are side and end views of another modification.

In the drawings it will be seen that the device is intended to be located between a pair of tiles 10, or similar elements, the use of which is well known. A wood member or form 11 forms the bottom surface of the rib or beam which is to contain the reinforcing rods. Such rods are indicated at 12, in Figs. 1 and.2. The device of my invention comprises a pair of inverted V.- shaped legs 13 which are preferably composed of wire and conected by means of a member 1 1 which is welded nearits ends to the supports. The ends 15, of the connecting member, may project beyond the supports to an extent'necessary to span the space between the tiles 10. This over-hang or projection of the ends of the connecting member may be as great as desired; it being noted, however, that in any case the supports 13 may be located close to the rods or bars 12, which are of considerable weight. Intermediate of the e ds of the connecting member are recesses 6, which constitute seats for the reinforcing rods 12. I may provide one or more of suchseats as desired, the number being dependent upon the character of reinforcement required. The seats may be made as deep as desired and thus securely hold the reinforcing rods without necessitating the employment of fastening ties. The connecting member is electrically welded to the supports at a point close to the recesses or seats. Inasmuch as the distance between centers of reinforcing rods is constant in work of this character, it will be seen that variations in beam width may be taken care of without change in dies merely by varying the amount of overhang 15, of the connecting member.

In the construction shown in Fig. 4:, the connecting member 17 is arranged toprovide but one recess 18. The legs or supports were of similar form, but may be provided with end extensions or feet 20,.

which serve to increase the area, of contact with the form and prevent the iegs from digging into the form.

In the construction shown in Figs. 6 and 7 i may provide the connecting member 21 with three recesses :22. in this case it 11121) be found desirable to provide an intermediate V-shaped support 23 which. as shown. will be of less height than the end supports. Its use obviates the necessity tor emplo ving unnecessarily heavy wire for the connee-tint member.

Obviously other modifications may be made in the construction shown, and l do not wish to be limited except as indicated in the appended claims.

it claim:

1. in a chair adapted to be located between adjacent tiles. the combination of a pair of inverted V-shaped supports and a connecting member welded to the apex of each support. said member being bent to provide a seat for a reinforcing: rod, the ends of the member serving to space the chair from the tiles. sul'ist-antially as de scribed.

2. in a chair adapted to be located between adjacent tiles. the combination of a pair of. inverted V-shaped supports and a connecting member welded to the apex of each support, said member being composed of a length of wire welded at points near its ends to said supports and bent to provide an intermediate seat for a reinforcing bar, substantially as described.

3. A beam chair comprising in combination a pair of inverted V-shaped supports i-more tion a pair of inverted f-shaped supports and a single length of wire welded to and connecting: said supports, said wire projecting at its ends beyond said supports and serving to laterally space the chair and being intermediately bent to provide an open top recess constituting a seat for a reinforcing bar, substantially as described.

5. A beam chair, comprising, in combination, a pair of inverted Vshaped supports and a connecting member welded to the supports at points near its ends, said member providing a depressed seat for a reinforcing bar.

6. A beam chair comprising, in combination, a pair of inverted V-shaped supports and a connecting member Welded to the supports at points near its ends, said member being shaped to provide a plurality of seats for reinforcing bars.

7. A beam chair comprising, in combination. a horizontal member having: a plurality of depressions forming seats for reinforcing bars, and legs Welded to the horizontal member at points near its ends. i

Signed at Chicago, 111., this 27th day of August, 1920.

WILLKAM E. W1 i 1'liE. 

